期刊
SCIENCE
卷 344, 期 6183, 页码 516-519出版社
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/science.1251423
关键词
-
资金
- NSF [SES-0962625]
- National Oceanic and Atmospheric Administration [NA11OAR4310095]
- USDA's Risk Management Agency
- Australian Research Council [LP100100495]
- Direct For Social, Behav & Economic Scie
- Divn Of Social and Economic Sciences [0962625] Funding Source: National Science Foundation
- Divn Of Social and Economic Sciences
- Direct For Social, Behav & Economic Scie [962559] Funding Source: National Science Foundation
- Australian Research Council [LP100100495] Funding Source: Australian Research Council
A key question for climate change adaptation is whether existing cropping systems can become less sensitive to climate variations. We use a field-level data set on maize and soybean yields in the central United States for 1995 through 2012 to examine changes in drought sensitivity. Although yields have increased in absolute value under all levels of stress for both crops, the sensitivity of maize yields to drought stress associated with high vapor pressure deficits has increased. The greater sensitivity has occurred despite cultivar improvements and increased carbon dioxide and reflects the agronomic trend toward higher sowing densities. The results suggest that agronomic changes tend to translate improved drought tolerance of plants to higher average yields but not to decreasing drought sensitivity of yields at the field scale.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据